ohh yeh you need to fit them aswell.unfortunatly, you do achally need an iphone/ipod device to run the app to fully unlock the ESC, yeh you could change the gearing, but that still dosnt unlock the ESC and you wont get the full potential out of the car.
this is the small print on bottom of traxxas page
http://traxxas.com/products/models/electric/6407xo1
"*Unlock the 100+mph speed only with the Traxxas Link App.
Included high-speed gearing and High Downforce splitter are required for 100+mph operation.
Unlocking 100+mph speed capability requires the Traxxas Link Application (download from the App Store) and an iPhone or iPod touch (sold separately). iPhone and iPod touch are trademarks of Apple Inc., registered in the U.S. and other countries."
i think its really naughty trying to push out Apple products this way, and a bad call for Traxxas saying its 100mph RTR out the box, when its only 100mph ready if you have an ipod/iphone to use the app and unlock it.
they havnt even given you any other way to unlock it.
As much as i want an XO-1 i hate apple products, so thats kinda the deal breaker for me.
if they realse a version were Iturds arnt needed i would snatch one up without even blinking.
but if this is the route Traxxas is going to take teaming with apple to push there products, im never buying a traxxas product again